Flour-bolt



(No Model.) i

J. THOMAS'.

FLOUR BOLT.

No. 397,761. Patented Feb. 12, 1889.

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IINTTED STATES PATENT fIFFICE.

JABEZ THOMAS, OF DARIAINGTON, ASSIGNOR OF ONE-HALF TO IVILLIAM E. CARTER, OF PLATTEVILLE, IYISCONSIN.

FLOURHBOLT.

SPECIFICATION forming part of Letters Patent No. 397,761, dated February 12, 1889.

Application filed January 20, 1886. RenewedDecember 24, 1886. Serial No. 222,527A (No model.)

To all whom it' may concern;

Be it known that I, JABEZ THOMAS, a citizen oi' the United States, residing at Darlington, in the county of Lafayette and Sta-te of Wisconsin, have invented certain new and useful Improvements in Flour-Bolts; and I do hereby declare the Vfollowingto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or iigures of reference marked thereon, which iorm a part of this specification.

This invention relates to Hour-bolts; and it consists of an improved arrangement and construction of parts which by means of a gentle pressure forces the iine flour through the bolting-cloth and leaves behind the coarser particles and impurities, thereby producinga pure and high-grade class of iiour.

In many instances prior to my invention iiour has been bolted by passing it through a bolting-cloth; but considerable violence has generally been used to throw the unbolted iiour against the cloth, and many of the impurities have in consequence been forced through the cloth with the flour. Brushes have frequently been used in connection with sieves to sweep the unbolted material across the screen and force it through the meshes; but whenever brushes have been thus used it has always been in connection with screens that are horizontal, or substantially so, and many impurities pass through the screen al ong with the tine iiour. To avoid these defects and. secure the desired result of a pure iiue .Hour product, I use a screen in a substantially vertical position or with quite a steep inclination, and I cause the unbolted iiour to be carried from the bottom upward against the surface of the screen and pressed against it with a gentle steady pressure.

In t-he accompanying (lrawings, Figure lis a rear view ot' the machine with portions ot' g the outer casing removed. cal cross-section of the machine.

Fig. is a verti- A is the bolting-cloth, secured to any suit 1 present case the screen is stationary and its frame is iirmly attached to the machine.

B is the outer casing of the machine, provided with an upright, l), at each end, and with the 'fee/tb', sothat it may stand securely.

b2 are doors formed in the casing and provided with hinges h and latches h, so that ready access may be had tothe interior. An opening, h, is provided in the upper part of the casin g B, through which the middlin gs or other material to be purified is introduced into the machine. U3 is an opening'in `the lower part of the said casing tor removing the iine flour after it has passed through the bolting-eloth.

C are partitions Iirmly secured at each end to the uprights h parallel to the bolting-cloth, so as to leave a narrow passage between the said partitions and the bolting-eloth.

D is a roller journaled in the uprights at the top of the machine above the partitions C, and D is a similar roller, also journaled in the uprights b below the said partition. The roller D is provided with the driving-pulleys d and d', and the roller D is provided with a driving-pulley, d2.

E is an elevator composed of a series of beveled slats secured upon belts e, which pass over the rollers D and D. These slats may be arranged horizontally, or they may have a slight inclination in either direction, as required.

F is a conveyer journaled in the uprights b and provided with a driving-pulley, f.

G is a Hoor which separates the conveyer F from the elevator E. g is a passage which connects the said conveyer with the opposite side of the bolting-cloih away from vthe eleva-tor. A second conveyer, Il, may be formed in the lower part of the casing and separated from the first conveyer by a partition, 7L. I is a driving cord or belt which connects the pulleys d', d?, and d3.

The action of the Hour-bolt is as follows: The unbolted fiour, middlings, or other material to be purified is introduced into the upper part of the casing ol the machine through the opening h5. Itimmediately falls down upon the door G and is taken by the slats of the elevator and carried upward and pressed gently and steadily against the bolting-cloth- In the i The finer particles of flour pass through the IOO Said lJolting-cloth and [all through the passage g onto the conveyer F, which carries them along and discharges them through the openings il in the outer casing. The :middlings which do not pass through theholtingclot-h are carried over the top ot' the elevator, and, falling hack onto the lloor G, are again carried upward hy the elevator and pressed against the holting-clotl'l.

The lower conveyer, Il, is used for collecti ng the material usuallyv called cut-offs, which consists of Iiour containing' too many coarse particles to he sold as fine flour, and which, therefore, carried to one end ot the machine by the said eonveyer and there elevated by mechanism (not shown in the drawings) for the purpose ot'V being again passed through the holting-eloth.

The coarse matter may be discharged from the machine at any suitable point through any suitable opening. (Not shown.)

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1; In a flour-bolt, the combinationV of a vertical bolting-cloth and an endless-beltA elevator for raising the unbolted material in contact with the said -holti11g-eloth and pressing the said material gently thereupon7 Substantially as and tor the purpose Set forth,

In a ourbolt,the combination of an inelosing-case, a bolting-cloth arranged within the said ease, and an elevatorhaving a series of slats so related that the unbolted material is raised upward and pressed gently upon the surface of the holting-eloth, suhstaigitially as l and for the purpose set forth.

23. In a Hour-belt, the combination of an inclosing-case, a lichting-cloth, an elevator co1nprising a Series of slats and endless hands, the partition C, and the elevator-rollers j ournaled in the casing above and below the said partition, substantially as and Afor the purpose Set forth.

4.111 a Hounbolt, the combination of the outer casing having openin b5 and b therein, the bolti11g-cloth,tl1e elevator E, the partii tion C, the iioor G, and the conveyer F, communicating with the opposite side of the bolt ing-cloth away Afrom the elevator by theV passage g, substantially as and `for the purpose set forth.

In testimony whereof I affix my siguature'in presence ol two witnesses.

T. C. L. MACKAY, Guo. ANTHONY. 

